FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* various OS-feature replacement utilities
3			* copyright (c) 2000, 2001, 2002 Fabrice Bellard
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#ifndef AVFORMAT_OS_SUPPORT_H
23			#define AVFORMAT_OS_SUPPORT_H
24
25			/**
26			* @file
27			* miscellaneous OS support macros and functions.
28			*/
29
30			#include "config.h"
31
32			#include <fcntl.h>
33			#include <sys/stat.h>
34
35			#ifndef O_BINARY
36			#define O_BINARY 0
37			#endif
38
39			#ifdef _WIN32
40			#if HAVE_DIRECT_H
41			#include <direct.h>
42			#endif
43			#if HAVE_IO_H
44			#include <io.h>
45			#endif
46			#endif
47
48			#ifdef _WIN32
49			# include <stdint.h>
50			# include <sys/types.h>
51			# ifdef off_t
52			# undef off_t
53			# endif
54			# define off_t int64_t
55			# ifdef lseek
56			# undef lseek
57			# endif
58			# define lseek(f,p,w) _lseeki64((f), (p), (w))
59			# ifdef stat
60			# undef stat
61			# endif
62
63			# define stat win32_stat
64
65			/*
66			* The POSIX definition for the stat() function uses a struct of the
67			* same name (struct stat), that why it takes this extra effort for
68			* redirecting/replacing the stat() function with our own one which
69			* is capable to handle long path names on Windows.
70			* The struct below roughly follows the POSIX definition. Time values
71			* are 64bit, but in cases when _USE_32BIT_TIME_T is defined, they
72			* will be set to values no larger than INT32_MAX which corresponds
73			* to file times up to the year 2038.
74			*/
75			struct win32_stat
76			{
77			_dev_t st_dev; /* ID of device containing file */
78			_ino_t st_ino; /* inode number */
79			unsigned short st_mode; /* protection */
80			short st_nlink; /* number of hard links */
81			short st_uid; /* user ID of owner */
82			short st_gid; /* group ID of owner */
83			_dev_t st_rdev; /* device ID (if special file) */
84			int64_t st_size; /* total size, in bytes */
85			int64_t st_atime; /* time of last access */
86			int64_t st_mtime; /* time of last modification */
87			int64_t st_ctime; /* time of last status change */
88			};
89
90			# ifdef fstat
91			# undef fstat
92			# endif
93			# define fstat win32_fstat
94			#endif /* defined(_WIN32) */
95
96
97			#ifdef __ANDROID__
98			# if HAVE_UNISTD_H
99			# include <unistd.h>
100			# endif
101			# ifdef lseek
102			# undef lseek
103			# endif
104			# define lseek(f,p,w) lseek64((f), (p), (w))
105			#endif
106
107		11383	static inline int is_dos_path(const char *path)
108			{
109			#if HAVE_DOS_PATHS
110			if (path[0] && path[1] == ':')
111			return 1;
112			#endif
113		11383	return 0;
114			}
115
116			#if defined(_WIN32)
117			#ifndef S_IRUSR
118			#define S_IRUSR S_IREAD
119			#endif
120			#ifndef S_IWUSR
121			#define S_IWUSR S_IWRITE
122			#endif
123			#endif
124
125			#if CONFIG_NETWORK
126			#if defined(_WIN32)
127			#define SHUT_RD SD_RECEIVE
128			#define SHUT_WR SD_SEND
129			#define SHUT_RDWR SD_BOTH
130			#else
131			#include <sys/socket.h>
132			#if !defined(SHUT_RD) /* OS/2, DJGPP */
133			#define SHUT_RD 0
134			#define SHUT_WR 1
135			#define SHUT_RDWR 2
136			#endif
137			#endif
138
139			#if !HAVE_SOCKLEN_T
140			typedef int socklen_t;
141			#endif
142
143			/* most of the time closing a socket is just closing an fd */
144			#if !HAVE_CLOSESOCKET
145			#define closesocket close
146			#endif
147
148			#if !HAVE_POLL_H
149			typedef unsigned long nfds_t;
150
151			#if HAVE_WINSOCK2_H
152			#include <winsock2.h>
153			#endif
154			#if !HAVE_STRUCT_POLLFD
155			struct pollfd {
156			int fd;
157			short events; /* events to look for */
158			short revents; /* events that occurred */
159			};
160
161			/* events & revents */
162			#define POLLIN 0x0001 /* any readable data available */
163			#define POLLOUT 0x0002 /* file descriptor is writeable */
164			#define POLLRDNORM POLLIN
165			#define POLLWRNORM POLLOUT
166			#define POLLRDBAND 0x0008 /* priority readable data */
167			#define POLLWRBAND 0x0010 /* priority data can be written */
168			#define POLLPRI 0x0020 /* high priority readable data */
169
170			/* revents only */
171			#define POLLERR 0x0004 /* errors pending */
172			#define POLLHUP 0x0080 /* disconnected */
173			#define POLLNVAL 0x1000 /* invalid file descriptor */
174			#endif
175
176
177			int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
178			#define poll ff_poll
179			#endif /* HAVE_POLL_H */
180			#endif /* CONFIG_NETWORK */
181
182			#ifdef _WIN32
183			#include <errno.h>
184			#include <limits.h>
185			#include <stdio.h>
186			#include <windows.h>
187			#include "libavutil/mem.h"
188			#include "libavutil/wchar_filename.h"
189
190			#ifndef _SSIZE_T_DEFINED
191			#define _SSIZE_T_DEFINED
192			typedef SSIZE_T ssize_t;
193			#endif
194
195			#define DEF_FS_FUNCTION(name, wfunc, afunc) \
196			static inline int win32_##name(const char *filename_utf8) \
197			{ \
198			wchar_t *filename_w; \
199			int ret; \
200			\
201			if (get_extended_win32_path(filename_utf8, &filename_w)) \
202			return -1; \
203			if (!filename_w) \
204			goto fallback; \
205			\
206			ret = wfunc(filename_w); \
207			av_free(filename_w); \
208			return ret; \
209			\
210			fallback: \
211			/* filename may be be in CP_ACP */ \
212			return afunc(filename_utf8); \
213			}
214
215			DEF_FS_FUNCTION(unlink, _wunlink, _unlink)
216			DEF_FS_FUNCTION(mkdir, _wmkdir, _mkdir)
217			DEF_FS_FUNCTION(rmdir, _wrmdir , _rmdir)
218
219			static inline int win32_access(const char *filename_utf8, int mode)
220			{
221			wchar_t *filename_w;
222			int ret;
223			if (get_extended_win32_path(filename_utf8, &filename_w))
224			return -1;
225			if (!filename_w)
226			goto fallback;
227			ret = _waccess(filename_w, mode);
228			av_free(filename_w);
229			return ret;
230			fallback:
231			return _access(filename_utf8, mode);
232			}
233
234			static inline void copy_stat(struct _stat64 *crtstat, struct win32_stat *buf)
235			{
236			buf->st_dev = crtstat->st_dev;
237			buf->st_ino = crtstat->st_ino;
238			buf->st_mode = crtstat->st_mode;
239			buf->st_nlink = crtstat->st_nlink;
240			buf->st_uid = crtstat->st_uid;
241			buf->st_gid = crtstat->st_gid;
242			buf->st_rdev = crtstat->st_rdev;
243			buf->st_size = crtstat->st_size;
244			buf->st_atime = crtstat->st_atime;
245			buf->st_mtime = crtstat->st_mtime;
246			buf->st_ctime = crtstat->st_ctime;
247			}
248
249			static inline int win32_stat(const char *filename_utf8, struct win32_stat *buf)
250			{
251			struct _stat64 crtstat = { 0 };
252			wchar_t *filename_w;
253			int ret;
254
255			if (get_extended_win32_path(filename_utf8, &filename_w))
256			return -1;
257
258			if (filename_w) {
259			ret = _wstat64(filename_w, &crtstat);
260			av_free(filename_w);
261			} else
262			ret = _stat64(filename_utf8, &crtstat);
263
264			copy_stat(&crtstat, buf);
265
266			return ret;
267			}
268
269			static inline int win32_fstat(int fd, struct win32_stat *buf)
270			{
271			struct _stat64 crtstat = { 0 };
272			int ret;
273
274			ret = _fstat64(fd, &crtstat);
275
276			copy_stat(&crtstat, buf);
277
278			return ret;
279			}
280
281			static inline int win32_rename(const char *src_utf8, const char *dest_utf8)
282			{
283			wchar_t *src_w, *dest_w;
284			int ret;
285
286			if (get_extended_win32_path(src_utf8, &src_w))
287			return -1;
288			if (get_extended_win32_path(dest_utf8, &dest_w)) {
289			av_free(src_w);
290			return -1;
291			}
292			if (!src_w || !dest_w) {
293			av_free(src_w);
294			av_free(dest_w);
295			goto fallback;
296			}
297
298			ret = (MoveFileExW(src_w, dest_w, MOVEFILE_REPLACE_EXISTING) == 0) ? -1 : 0;
299			av_free(src_w);
300			av_free(dest_w);
301			// Lacking proper mapping from GetLastError() error codes to errno codes
302			if (ret)
303			errno = EPERM;
304			return ret;
305
306			fallback:
307			/* filename may be be in CP_ACP */
308			#if !HAVE_UWP
309			ret = (MoveFileExA(src_utf8, dest_utf8, MOVEFILE_REPLACE_EXISTING) == 0) ? -1 : 0;
310			if (ret)
311			errno = EPERM;
312			#else
313			/* Windows Phone doesn't have MoveFileExA, and for Windows Store apps,
314			* it is available but not allowed by the app certification kit. However,
315			* it's unlikely that anybody would input filenames in CP_ACP there, so this
316			* fallback is kept mostly for completeness. Alternatively we could
317			* do MultiByteToWideChar(CP_ACP) and use MoveFileExW, but doing
318			* explicit conversions with CP_ACP is allegedly forbidden in windows
319			* store apps (or windows phone), and the notion of a native code page
320			* doesn't make much sense there. */
321			ret = rename(src_utf8, dest_utf8);
322			#endif
323			return ret;
324			}
325
326			/*
327			* Positional I/O and file locking. Unlike pread() and pwrite() the Windows
328			* versions move the file position of the descriptor. A flock() lock covers
329			* only the first byte of the file, ReadFile() and WriteFile() of that byte
330			* from other processes block or fail while the lock is held. Mapped
331			* views of the file are not affected.
332			*/
333			#ifndef LOCK_SH
334			#define LOCK_SH 1
335			#define LOCK_EX 2
336			#define LOCK_NB 4
337			#define LOCK_UN 8
338			#endif
339
340			static inline ssize_t win32_pread(int fd, void *buf, size_t size, off_t offset)
341			{
342			HANDLE fh = (HANDLE)_get_osfhandle(fd);
343			OVERLAPPED ov = { .Offset = offset, .OffsetHigh = offset >> 32 };
344			DWORD n;
345
346			if (fh == INVALID_HANDLE_VALUE)
347			return -1;
348			if (size > INT_MAX)
349			size = INT_MAX;
350			if (!ReadFile(fh, buf, size, &n, &ov)) {
351			if (GetLastError() == ERROR_HANDLE_EOF)
352			return 0;
353			errno = EIO;
354			return -1;
355			}
356			return n;
357			}
358
359			static inline ssize_t win32_pwrite(int fd, const void *buf, size_t size, off_t offset)
360			{
361			HANDLE fh = (HANDLE)_get_osfhandle(fd);
362			OVERLAPPED ov = { .Offset = offset, .OffsetHigh = offset >> 32 };
363			DWORD n;
364
365			if (fh == INVALID_HANDLE_VALUE)
366			return -1;
367			if (size > INT_MAX)
368			size = INT_MAX;
369			if (!WriteFile(fh, buf, size, &n, &ov)) {
370			errno = GetLastError() == ERROR_DISK_FULL ? ENOSPC : EIO;
371			return -1;
372			}
373			return n;
374			}
375
376			static inline int win32_flock(int fd, int op)
377			{
378			HANDLE fh = (HANDLE)_get_osfhandle(fd);
379			OVERLAPPED ov = { 0 };
380			BOOL ok;
381
382			if (fh == INVALID_HANDLE_VALUE)
383			return -1;
384			if (op & LOCK_UN) {
385			ok = UnlockFileEx(fh, 0, 1, 0, &ov);
386			} else {
387			DWORD flags = 0;
388			if (op & LOCK_EX)
389			flags |= LOCKFILE_EXCLUSIVE_LOCK;
390			if (op & LOCK_NB)
391			flags |= LOCKFILE_FAIL_IMMEDIATELY;
392			ok = LockFileEx(fh, flags, 0, 1, 0, &ov);
393			}
394			if (!ok) {
395			errno = GetLastError() == ERROR_LOCK_VIOLATION ? EWOULDBLOCK : EIO;
396			return -1;
397			}
398			return 0;
399			}
400
401			#define mkdir(a, b) win32_mkdir(a)
402			#define rename win32_rename
403			#define rmdir win32_rmdir
404			#define unlink win32_unlink
405			#define access win32_access
406			#define pread win32_pread
407			#define pwrite win32_pwrite
408			#define flock win32_flock
409
410			#endif
411
412			#endif /* AVFORMAT_OS_SUPPORT_H */
413